Hard Drive Cloning?

I have an old copy of Ghost version 9 (recovers & backs-up in DOS). Seems to work fine - but there has been problems with images being corrupt, and other suggestions on FAST Cloning software. Not from reviews, but from actual use. What works? I'm testing Nero and I'm backing up 400GB of data and it's take about 12 hours. Not bad I guess... but is there anything better?